Sea to Summit's Ultra-Fine Mesh Headnet is a super lightweight head net which features mesh fine enough to protect against even the smallest biting insects.

Sea to Summit says:

Are tiny biting insects ruining your outdoor experience? Do midges, black flies, no-see-ums or sand-flies gravitate towards you, leaving you with itching welts once they've had their way with you? Consider upgrading your head net to our new, ultra-fine mesh. More than four times finer than our existing mosquito mesh, even the smallest biting insects won't be able to squirm their way through, leaving you bite-free.

The clue is in the name with Sea to Summit's Ultra-Fine Mesh Headnet. It's ultra-fine mesh is four times finer than most mosquito nets, giving you even better protection. It's incredibly light at only 16 grams and comes in a tiny stuff sack that will help to keep the net protected in your pocket when not being used. Ideal for those traveling and hiking in areas with a high population of biting insects.